File: groff.info,  Node: Page Layout Adjustment,  Next: Displays and Keeps,  Prev: Headers and Footers,  Up: Common Features

3.2.4 Page Layout
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Most macro packages let the user specify the size of the page margins.
The top and bottom margins are typically handled differently than the
left and right margins; the latter two are derived from the page offset,
indentation, and line length.  *Note Line Layout::.  Commonly, packages
support registers to tune these values.